Centaurea cyanus 'Polka Dot Mixed' Dwarf Cornflower 'Polka Dot Mixed' A compact dwarf mix bred in 1960 specifically for amateur gardeners — producing the widest colour range of any cornflower (blue, maroon, red, rose, pink, lavender and white) on bushy 30–50cm plants that thrive in containers, window boxes, and the front of any cottage border. Most cornflowers are tall — properly back-of-border architecture at 75–90cm. 'Polka Dot Mixed' is the dwarf, bushy, container-friendly counterpart, bred specifically to bring the full cornflower colour range to gardeners who don't have space for tall border plants or who want compact mounds at the front of mixed plantings. Each packet produces a true polka-dot palette of blue, deep maroon, raspberry red, soft rose, gentle pink, lavender and pure white, all at the same compact 30–50cm height. The flowers are smaller than the tall 'Ball' cornflowers but still fully double and ruffled, and produced in genuine abundance from June through to autumn. Hardy annual, RHS Plants for Pollinators recognised, edible petals. Self-seeds reliably and the dwarf habit is largely retained in volunteer offspring. A note on growing The autumn-sowing advantage applies just as strongly to dwarf cornflowers — September-sown plants establish stronger roots and flower earlier and more floriferously the following year. Or sow March to May for a summer display. Direct sow into the final position (deep taproot resents transplanting). Sow at 3mm depth in well-drained soil. Full sun. Lean, poor soil produces the most compact, floriferous plants — rich ground encourages floppy growth even in this dwarf type. In containers, use a well-draining peat-free compost without added fertiliser. Deadhead regularly to maintain flowering. Where it shines In containers, window boxes and patio pots where the compact 30–50cm height is genuinely useful and the wide colour range provides interest in a small space. At the front of cottage borders, where the multi-coloured mounds soften hard edges. In children's gardens — easy to grow, reliably colourful, no staking required. In wildlife and pollinator gardens, where a compact polka-dot drift can fit even small plots. In cutting from the cottage garden, the shorter stems work well for short, informal posies and small jugs. Plant alongside For container planting, combine with the dwarf Calendula 'Oopsy Daisy' and Alyssum 'Carpet of Snow' for a compact cottage container with consistent height. At the front of borders, plant in front of taller cornflowers ('Blue Ball', 'Black Ball', 'Snowman') for a cornflower-themed border with built-in height layering. For pure colour mix, pair with Antirrhinum 'Crown Mixed' for matching multi-colour cottage cheer.
